Plāin'-sŏng, n.
n. 1. An ecclesiastical chant in duple measure with tones of equal length, and rarely extending beyond the compass of an octave. 2. A simple melody. Halliwell.
n. 1. An ecclesiastical chant in duple measure with tones of equal length, and rarely extending beyond the compass of an octave. 2. A simple melody. Halliwell.